CN102435367B - Device for testing pre-tightening force of matched bearings - Google Patents
Device for testing pre-tightening force of matched bearings Download PDFInfo
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- CN102435367B CN102435367B CN 201110280590 CN201110280590A CN102435367B CN 102435367 B CN102435367 B CN 102435367B CN 201110280590 CN201110280590 CN 201110280590 CN 201110280590 A CN201110280590 A CN 201110280590A CN 102435367 B CN102435367 B CN 102435367B
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Abstract
The invention discloses a device for testing the pre-tightening force of matched bearings, relates to a device for testing the pre-tightening force of a bearing, and aims to solve the problems that the existing measurement apparatus needs an air source and has relatively high requirements on environment and the test accuracy on the pre-tightening force of the bearing is low. A linear bearing is sleeved on each guide rail; the two ends of a force sensor bracket are connected with the guide rail through a linear bearing in a sliding manner respectively; a force sensor is fixedly mounted on the lower end surface of the force sensor bracket; a displacement sensor is mounted on the upper end surface of a base through a displacement sensor bracket; the two ends of a support frame are fixedly connected with the upper ends of two guide rails respectively; a motor is fixedly mounted on the upper end surface of the support frame through a motor bracket; an output shaft of the motor is fixedly connected with the upper end of a screw through a shaft coupling; a spring seat is fixedly mounted on the upper end surface of the force sensor bracket; a shell is fixedly mounted at the upper end of the spring seat; the screw is located in the shell; a compression nut is in threaded connection with the screw; and a spring is sleeved on the screw and located between the compression nut and the spring seat. The device disclosed by the invention is used for testing the pre-tightening force of the matched bearings.
Description
Technical field
The present invention relates to a kind of bearing pre-tightened force test device.
Background technology
Since New Century, China's equipment manufacture presents lasting, quick, comprehensive growth.Along with the development of equipment manufacture, also more and more higher to the requirement of precise motion mechanism, accurately applying bearing pre-fastening is one of gordian technique of precision mechanism design.By bearing is applied pretightning force, can improve the running accuracy of mechanism, reduce vibration and noise, can prevent that in the high speed light loading ball bearing steel ball from revolution occuring skid, reduce the steel ball revolving sliding, thereby reduce friction and heating, finally make mechanism reach long-life requirement.
Open day be measuring method and the measuring instrument that patent of invention that July 16, publication number in 2008 are CN 100570300C has proposed a kind of indirect measurement pre-tightening force of matched bearings, but described measuring instrument need source of the gas, higher to environmental requirement; Described measuring instrument does not arrange locking at the outer race place, does not namely consider the bearing face surface figure accuracy, causes the bearing pre-fastening measuring accuracy low.
Summary of the invention
The present invention needs source of the gas for solving existing measuring instrument, and problem that bearing pre-fastening measuring accuracy low higher to environmental requirement, and then a kind of device for testing pre-tightening force of matched bearings is provided.
The present invention solves the problems of the technologies described above the technical scheme of taking to be: device for testing pre-tightening force of matched bearings of the present invention comprises drive unit, spring charging device, guide piece, measured bearing fixedly charger, power sensor, displacement transducer, displacement sensor bracket, bracing frame and support; Described drive unit comprises motor, electric machine support and shaft coupling; Described spring charging device comprises shell, gland nut, screw rod, spring bearing, spring and spring base; Described guide piece comprises power sensor stand, two guide rails and two linear bearings; Described measured bearing fixedly charger comprises the loading keeper, loads disk, set nut, outer ring seat, outer shroud spacer ring, interior ring spacer ring and interior loop mapping axle; Described two guide rails relatively vertically are packed on the upper surface of support, be set with a linear bearing on every guide rail, the two ends of described power sensor stand respectively are slidably connected by a linear bearing and guide rail, described power sensor is packed on the lower surface of power sensor stand, and described displacement transducer is arranged on the upper surface of support by displacement sensor bracket;
described measured bearing fixedly charger is packed on the upper surface of support and between two guide rails, described interior loop mapping axle is packed on the upper surface of support by positioning seat, described outer shroud cover for seat is contained on interior loop mapping axle, form toroidal cavity between described outer ring seat and interior loop mapping axle, described outer shroud spacer ring and interior ring spacer ring all are positioned at toroidal cavity, described interior ring spacer ring is sleeved on interior loop mapping axle, described interior ring spacer ring is positioned at the outer shroud spacer ring, described outer shroud spacer ring and interior ring spacer ring are used for two measured bearings are separated, described set nut is threaded with outer ring seat, described set nut is used for the outer shroud of locking measured bearing, described loading disk be positioned at the loop mapping axle directly over, described loading disk is used for ring in measured bearing is loaded, described loading keeper is packed on the upper surface that loads disk, be processed with locating slot on the upper surface of described loading keeper,
the two ends of support frame as described above are affixed with the upper end of two guide rails respectively, described motor is packed on the upper surface of bracing frame by electric machine support, the output shaft of motor is affixed by the upper end of shaft coupling and screw rod, described spring base is packed on the upper surface of power sensor stand, described shell is packed in the upper end of spring base, described screw rod is positioned at shell, described gland nut is connected with screw flight, described spring housing is contained on screw rod and between gland nut and spring base, on described gland nut along being processed with groove on the thickness direction of gland nut, the upper inside wall of described shell vertically is provided with boss, described boss is positioned at groove.
The invention has the beneficial effects as follows: device for testing pre-tightening force of matched bearings of the present invention adopts fixedly charger of measured bearing, detect the pretightning force of matched bearings by the variation of axial rigidity, determine that by the length difference of bearing bulge quantity and bearing internal external spacer ring the indirect method of bearing pre-fastening compares with existing device for testing pre-tightening force of matched bearings, owing to having considered the bearing face surface figure accuracy, greatly improved the bearing pre-fastening measuring accuracy;
Device for testing pre-tightening force of matched bearings of the present invention adopts spring to load, and detects loaded load by the power sensor, need to adopt source of the gas to compare with existing pre-tightening force of matched bearings method of testing, and operation is more simple, lower to environmental requirement; Adopt counterweight to load with existing pre-tightening force of matched bearings method of testing and compare, operate more stable, lower to operator's requirement, labour intensity is lower.
Description of drawings
Fig. 1 is that the master of device for testing pre-tightening force of matched bearings of the present invention looks cut-open view, Fig. 2 is the I section enlarged drawing of Fig. 1, Fig. 3 is the stereographic map of device for testing pre-tightening force of matched bearings of the present invention, Fig. 4 is bearing loaded load and displacement relation change curve, bearing rigidity loading-displacement relation change curve when wherein a encircles spacer ring for installation is not interior, bearing rigidity loading-displacement relation change curve when b encircles spacer ring for installation is interior, bearing rigidity loading-displacement relation change curve when c hangs down for encircling spacer ring and bearing rigidity in installing, d is the loading-displacement relation difference curve of bearing rigidity loading procedure when interior ring spacer ring being arranged and there is no interior ring spacer ring.
Embodiment
Embodiment one: as shown in Fig. 1～3, the device for testing pre-tightening force of matched bearings of present embodiment comprises drive unit, spring charging device, guide piece, measured bearing fixedly charger, power sensor 23, displacement transducer 25, displacement sensor bracket 26, bracing frame 10 and support 38; Described drive unit comprises motor 2, electric machine support 4 and shaft coupling 5; Described spring charging device comprises shell 15, gland nut 16, screw rod 17, spring bearing 7, spring 18 and spring base 21; Described guide piece comprises power sensor stand 24, two guide rails 12 and two linear bearings 14; Described measured bearing fixedly charger comprises loading keeper 27, loads disk 29, set nut 30, outer ring seat 31, outer shroud spacer ring 33, interior ring spacer ring 34 and interior loop mapping axle 35; Described two guide rails 12 relatively vertically are packed on the upper surface of support 38, be set with a linear bearing 14 on every guide rail 12, the two ends of described power sensor stand 24 respectively are slidably connected by a linear bearing 14 and guide rail 12, described power sensor 23 is packed on the lower surface of power sensor stand 24, and described displacement transducer 25 is arranged on the upper surface of support 38 by displacement sensor bracket 26;
described measured bearing fixedly charger is packed on the upper surface of support 38 and between two guide rails 12, described interior loop mapping axle 35 is packed on the upper surface of support 38 by positioning seat 37, described outer ring seat 31 is sleeved on interior loop mapping axle 35, form toroidal cavity 39 between described outer ring seat 31 and interior loop mapping axle 35, described outer shroud spacer ring 33 and interior ring spacer ring 34 all are positioned at toroidal cavity 39, described interior ring spacer ring 34 is sleeved on interior loop mapping axle 35, described interior ring spacer ring 34 is positioned at outer shroud spacer ring 33, described outer shroud spacer ring 33 and interior ring spacer ring 34 are used for two measured bearings are separated, described set nut 30 is threaded with outer ring seat 31, described set nut 30 is used for the outer shroud of locking measured bearing, described loading disk 29 be positioned at loop mapping axle 35 directly over, described loading disk 29 is used for ring in measured bearing is loaded, described loading keeper 27 is packed on the upper surface that loads disk 29, be processed with locating slot 27-1 on the upper surface of described loading keeper 27,
the two ends of support frame as described above 10 are affixed with the upper end of two guide rails 12 respectively, described motor 2 is packed on the upper surface of bracing frame 10 by electric machine support 4, the output shaft of motor 2 is affixed with the upper end of screw rod 17 by shaft coupling 5, described spring base 21 is packed on the upper surface of power sensor stand 24, described shell 15 is packed in the upper end of spring base 21, described screw rod 17 is positioned at shell 15, described gland nut 16 is threaded with screw rod 17, described spring 18 is sleeved on screw rod 17 and between gland nut 16 and spring base 21, on described gland nut 16 along being processed with groove 16-1 on the thickness direction of gland nut 16, the upper inside wall of described shell 15 vertically is provided with boss 15-1, described boss 15-1 is positioned at groove 16-1.
Two measured bearings are sleeved on interior loop mapping axle 35 and are positioned at toroidal cavity 39, and outer shroud spacer ring 33 and interior ring spacer ring 34 are between two measured bearings.
described motor 2 is packed on the upper surface of electric machine support 4 by a plurality of the first bolts 3, described electric machine support 4 is packed on the upper surface of back up pad by a plurality of the second bolts 8, the bottom of described electric machine support 4 is equipped with two bearings 7, screw rod 17 supports by two bearings 7, described two bearings 7 position locking by the first nut 6 and the second nut 9, the upper end of passing through two the 3rd nuts 11 and two guide rails 12 of support frame as described above 10 is affixed, described shell 15 is affixed by the upper end that a plurality of the 3rd bolts 13 are packed in spring base 21, described washer 19 is packed in the lower end of screw rod 17 by the 4th bolt 20, described spring base 21 and power sensor 23 are packed on power sensor stand 24 by the 5th bolt 22, described loading keeper 27 is packed on the upper surface that loads disk 29 by a plurality of the 6th bolts 28, described interior loop mapping axle 35 is packed on the upper surface of positioning seat 37 by a plurality of the 7th bolts 40, described positioning seat 37 is packed on the upper surface of support 38 by a plurality of the 8th bolts 36, the lower end of every guide rail 12 is packed on support 38 by the 4th nut 11.
Pretightning force proving installation of the present invention adopts general mounting interface, can realize the pretightning force of multiple bearing is measured.
Embodiment two: as shown in Figure 1, the described locating slot 27-1 of present embodiment is the V-arrangement locating slot.So design, V-arrangement locating slot can make the location at spherical surface that loads keeper 27 and power sensor 23 loading ends accurate, and when having guaranteed loading, loading force does not produce eccentric moment, the error that reduces to measure.Other composition and annexation are identical with embodiment one.
Embodiment three: as shown in Figure 3, the described support 38 of present embodiment is made of base plate 38-1 and four column 38-2, and described four column 38-2 are packed on four jiaos of base plate 38-1.So design, the support steadiness is good.Other composition and annexation are identical with embodiment one or two.
Specifically embodiment four: as shown in Figure 1, the described motor 2 of present embodiment is Dual-output shaft motor.So design, can install handwheel 1 easily.Other composition and annexation are identical with embodiment three.
Specifically embodiment five: as shown in figures 1 and 3, the described pretightning force proving installation of present embodiment also comprises handwheel 1, and described handwheel 1 is arranged on another output shaft of motor 2.So design, screw rod 17 namely can drive by motor 2, also can pass through handwheel 1 manual drives, adopt automatically to load image data and the artificial image data dual mode that loads, and have improved the dirigibility of operation.Other composition and annexation are identical with embodiment four.
Principle of work:
The loading procedure of power: drive motor 2 rotations, motor 2 rotarily drives screw rod 17 and rotates, screw rod 17 rotates drive nut 16 and moves downward, and when power sensor 23 did not contact loading keeper 27, spring charging assembly and power sensor stand 24, power sensor 23 together moved down with nut 16; When power sensor 23 touches loading keeper 27, nut 16 beginning Compress Springs 18, load is delivered to by spring 18, power sensor stand 24, power sensor 23 and loads on keeper 27, be applied on the interior ring of measured bearing 32 by loading disk 29, thereby realization is to the loading of matched bearings.
Pretightning force disposal route for the matched bearings of different-stiffness bearing: (as shown in Figure 4)
For the lower situation of bearing rigidity (or situation of elastic preload): the pretightning force of bearing assembly is by recording pretightning force value F corresponding to flex point B in loading procedure curve c in embodiment one
0Determine the pretightning force of matched bearings;
For the higher situation of bearing rigidity (or higher with respect to testing apparatus or test fixture rigidity): the pretightning force of bearing assembly is connected with interior ring spacer ring 34 and does not have the difference of the stiffness curve that interior ring spacer ring 34 surveys to judge, namely by pretightning force value F corresponding to flex point C in loading procedure difference curve d
0Determine the pretightning force of matched bearings.
Claims (5)
1. device for testing pre-tightening force of matched bearings, it is characterized in that: described pretightning force proving installation comprises drive unit, spring charging device, guide piece, measured bearing fixedly charger, power sensor (23), displacement transducer (25), displacement sensor bracket (26), bracing frame (10) and support (38); Described drive unit comprises motor (2), electric machine support (4) and shaft coupling (5); Described spring charging device comprises shell (15), gland nut (16), screw rod (17), spring bearing (7), spring (18) and spring base (21); Described guide piece comprises power sensor stand (24), two guide rails (12) and two linear bearings (14); Described measured bearing fixedly charger comprises loading keeper (27), loads disk (29), set nut (30), outer ring seat (31), outer shroud spacer ring (33), interior ring spacer ring (34) and interior loop mapping axle (35); Described two guide rails (12) all relative support (38) vertically are packed on the upper surface of support (38), be set with a linear bearing (14) on every guide rail (12), the two ends of described power sensor stand (24) respectively are slidably connected by a linear bearing (14) and guide rail (12), described power sensor (23) is packed on the lower surface of power sensor stand (24), and described displacement transducer (25) is arranged on the upper surface of support (38) by displacement sensor bracket (26);
described measured bearing fixedly charger is packed on the upper surface of support (38) and is positioned between two guide rails (12), described interior loop mapping axle (35) is packed on the upper surface of support (38) by positioning seat (37), described outer ring seat (31) is sleeved on interior loop mapping axle (35), form toroidal cavity (39) between described outer ring seat (31) and interior loop mapping axle (35), described outer shroud spacer ring (33) and interior ring spacer ring (34) all are positioned at toroidal cavity (39), described interior ring spacer ring (34) is sleeved on interior loop mapping axle (35), described interior ring spacer ring (34) is positioned at outer shroud spacer ring (33), described outer shroud spacer ring (33) and interior ring spacer ring (34) are used for two measured bearings are separated, described set nut (30) is threaded with outer ring seat (31), described set nut (30) is used for the outer shroud of locking measured bearing, described loading disk (29) be positioned at loop mapping axle (35) directly over, described loading disk (29) is used for ring in measured bearing is loaded, described loading keeper (27) is packed on the upper surface that loads disk (29), be processed with locating slot (27-1) on the upper surface of described loading keeper (27),
the two ends of support frame as described above (10) are affixed with the upper end of two guide rails (12) respectively, described motor (2) is packed on the upper surface of bracing frame (10) by electric machine support (4), the output shaft of motor (2) is affixed with the upper end of screw rod (17) by shaft coupling (5), described spring base (21) is packed on the upper surface of power sensor stand (24), described shell (15) is packed in the upper end of spring base (21), described screw rod (17) is positioned at shell (15), described gland nut (16) is threaded with screw rod (17), described spring (18) is sleeved on screw rod (17) upward and is positioned between gland nut (16) and spring base (21), described gland nut (16) is upper along being processed with groove (16-1) on the thickness direction of gland nut (16), the upper inside wall of described shell (15) vertically is provided with boss (15-1), described boss (15-1) is positioned at groove (16-1).
2. device for testing pre-tightening force of matched bearings according to claim 1, it is characterized in that: described locating slot (27-1) is the V-arrangement locating slot.
3. device for testing pre-tightening force of matched bearings according to claim 1 and 2, it is characterized in that: described support (38) is made of base plate (38-1) and four columns (38-2), and described four columns (38-2) are packed on four jiaos of base plate (38-1).
4. device for testing pre-tightening force of matched bearings according to claim 3, it is characterized in that: described motor (2) is Dual-output shaft motor.
5. device for testing pre-tightening force of matched bearings according to claim 4, it is characterized in that: described pretightning force proving installation also comprises handwheel (1), described handwheel (1) is arranged on another output shaft of motor (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110280590 CN102435367B (en) | 2011-09-21 | 2011-09-21 | Device for testing pre-tightening force of matched bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110280590 CN102435367B (en) | 2011-09-21 | 2011-09-21 | Device for testing pre-tightening force of matched bearings |
Publications (2)
| Publication Number | Publication Date |
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| CN102435367A CN102435367A (en) | 2012-05-02 |
| CN102435367B true CN102435367B (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110280590 Expired - Fee Related CN102435367B (en) | 2011-09-21 | 2011-09-21 | Device for testing pre-tightening force of matched bearings |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914392B (en) * | 2012-10-22 | 2014-08-27 | 中国科学院西安光学精密机械研究所 | Device for measuring pretightening force and relative displacement of face-to-face paired angular contact ball bearings |
| CN102928227B (en) * | 2012-10-31 | 2015-01-07 | 中国科学院西安光学精密机械研究所 | Device for measuring pre-tightening force and relative displacement of back-to-back paired angular contact ball bearings |
| CN102928226B (en) * | 2012-10-31 | 2014-10-15 | 中国科学院西安光学精密机械研究所 | Back-to-back paired installation angular contact ball bearing parameter combination measuring device |
| CN103616182A (en) * | 2013-11-27 | 2014-03-05 | 中航工业哈尔滨轴承有限公司 | Loading device for sealed bearing grease leakage test |
| CN104712665A (en) * | 2013-12-11 | 2015-06-17 | 中国航空工业第六一八研究所 | Method for applying constant pressure load to matched bearings |
| CN106124108A (en) * | 2016-06-28 | 2016-11-16 | 苏州施奇尔汽车技术有限公司 | A kind of automobile wheel bearing moment of friction flexibility test machine |
| CN109883698B (en) * | 2017-12-05 | 2020-12-04 | 洛阳轴承研究所有限公司 | Method and device for measuring pre-tightening force of control moment gyro shafting and adjusting method |
| CN109540362A (en) * | 2018-11-15 | 2019-03-29 | 桂林福达股份有限公司 | A kind of craft quickly detects maximum separation power method after cap assembly abrasion |
| CN110849622B (en) * | 2019-10-14 | 2021-07-16 | 中国北方发动机研究所(天津) | Turbocharger thrust bearing performance testing device |
| CN110954324A (en) * | 2019-12-17 | 2020-04-03 | 武汉天拓宇航智能装备有限公司 | Universal bearing pre-tightening height measuring device and measuring method thereof |
| CN113983071B (en) * | 2021-09-30 | 2023-06-23 | 洛阳轴承研究所有限公司 | Method for matching face-to-face and back-to-back assembling bearing spacer by utilizing pretightening force |
| CN114061818A (en) * | 2021-10-09 | 2022-02-18 | 洛阳轴承研究所有限公司 | Face-to-face assembled bearing and spacer ring matching method of back-to-back assembled bearing |
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| JP2003206925A (en) * | 2002-01-15 | 2003-07-25 | Nsk Ltd | Pre-load measuring method for bearing, pre-load measuring device, and spindle device |
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| CN102053015A (en) * | 2009-10-30 | 2011-05-11 | 中国石油化工股份有限公司 | Tester for thrust bearing |
| JP2011169720A (en) * | 2010-02-18 | 2011-09-01 | Nsk Ltd | Method of measuring pre-load of hub unit bearing for supporting driving wheel |
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| JP2003206925A (en) * | 2002-01-15 | 2003-07-25 | Nsk Ltd | Pre-load measuring method for bearing, pre-load measuring device, and spindle device |
| CN101221076A (en) * | 2007-11-30 | 2008-07-16 | 洛阳轴研科技股份有限公司 | Method and instrument for indirectly measuring pretightening force between conjugate bearings |
| CN101493370A (en) * | 2008-11-08 | 2009-07-29 | 辽宁曙光汽车集团股份有限公司 | Drive axle assembly drive gear locking nut screwing and bearing pre-fastening moment detection device |
| CN102053015A (en) * | 2009-10-30 | 2011-05-11 | 中国石油化工股份有限公司 | Tester for thrust bearing |
| JP2011169720A (en) * | 2010-02-18 | 2011-09-01 | Nsk Ltd | Method of measuring pre-load of hub unit bearing for supporting driving wheel |
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